화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.33, No.10, 3029-3034, October, 2016
DOI10.1007/s11814-016-0170-y  Export Citation
Manganese oxides nanocrystals supported on mesoporous carbon microspheres for energy storage application
Dae-Hoon Yeom, Jaeho Choi, Woo Jin Byun, and Jung Kyoo Lee†
  • Department of Chemical Engineering, Dong-A University, Busan 49315, Korea
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Mesoporous carbon microspheres (MCM) with a uniform size distribution (1-2 μm in diameter) were replicated from mesoporous silica microspheres (MSM) by using sucrose as a carbon source. MCM (BET surface area=1,001m2/g, total pore volume=0.82 cc/g, average pore size=3.4 nm) was used as the support of MnOx nanocrystals (Mn3O4 with MnO as a minor phase). The MnOx/MCM composite was prepared by pore-filling wet-impregnation of Mn nitrate solution followed by a moderate annealing under Ar flow. Thus obtained MnOx/MCM composite was characterized as a high capacity anode for lithium ion battery (LIB). The electrochemical responses of MnOx/MCM were investigated in comparison with those of commercial graphite. The MnOx/MCM composite exhibited the reversible capacity of ~720mAh g-1 at the current density of 200mA g-1 with an excellent cycling stability up to 100 cycles. The MnOx/MCM composite also showed much higher volumetric capacity and better rate capability than the state of the art graphite anode, suggesting its potential use as a new anode material for LIBs.
Keywords:Lithium-ion Battery;Anode;Manganese Oxide;Mesoporous Carbon Microsphere;Transition Metal Oxide
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